Carbureter



R. l. HENDERSON.

CARBURETER.

APPLICATION FILED SEPTIZO, 1920.

Patented Oct. 11, 1921.

fllllllll lllllla I7 II I tum WIN HENDERSON, 01E TORONTU, ONT TU, CANADA.

CJBURIIETER.

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To a]? whom it may concern:

Be it known that T, ROBERT llmvix HEN- DERSON, a subject of the King of Great Britvery accurately adjusted and will not be liable to get out of order.

A further object is to insure the maintenance of a supply of fuel in the carburetor for starting the engine.

The principal feature of the invention consists in the novel construction and arrangement of parts whereby a valve controlling the flow of fuel to the carbureter is antomatically regulated by the movement of' the throttle and whereby aid valve may be independently adjusted.

Tn the drawings. Figure 1 is a plan view. of my improved carbureter.

Fig. 2 is a horizontal longitudinal sectional view.

Fig. 3' is an enlarged sectional detail of the valve. In the construction herein shown, the

. body 1 is of cylindrical form having a chamher 2 arranged upon the side wall and preferably formed integral therewith.

A fuel nozzle 3 is threaded into the side wall of the body 1 from the inner side of the chamber 2, said fuel nozzle havinga central opening 4L therethrough which is formed with a tapered,,-portion- 5 and the enlarged cylindrical portion 6 at the inner end.

The nozzle 3 projects into the cylindrical chamber 7 in the body 1 and a plurality of small holes 8 are bored through the side wall communicating with the tapered seat 5 of the orifice therein. These holes 8 are preferably arranged at, an inward incline and are adapted to project fine streams of fuel into the carburetor chamber.

A pin 9 extends across the cylindrical body portion of "the carbureter, being arranged parallel to the axis of the opening Specification of Letters Patent.

Patented Uct. Jllt. roar.

Application filed September 20, 1920. Serial No. M1576.

through the nozzle 3 and is located close to the said nozzle. A block 10 is slidably arranged on the pin 9 and is provided with a threaded hole 11 arranged in alinement with the axis of the nozzle.

A needle valve 12 formed with a threaded shank 13 is threaded into the block 10 and the reduced cylindrical portion 14 fits snugly into the cylindrical portion 6 of the nozzle and a tapered end 15 enters the tapered portion of the nozzle and is adapted to engage the valve seat 5.

The shank of the valye 12 extends outwardly through the side wall of the body 1 and is provided with a knurled head 16 by means of which it may be adjusted and a suitable spring arm 1? retains the adjust gnent by engagement with the knurled surace.

- The block 10 is formed with a toothed consequently sliding the block 10 upon the pin 9. This sliding movement is very limited owing to the gear ratio between the teeth 22 and the teeth 21. but as the throttle is moved the needle valve carried by the block 10 is moved inwardly and outwardly in the nozzle 3. The needle valve may be adjusted by being turned in the threaded block so that when the throttleis almost closed there will be be a very slight flow of fuel through the opening 4: to the carbureter chamber 7 and as the throttle is-opened the plate-20 is swung on its pivot and moves the block 10, thereby moving the needle valve so as to create a larger opening in the tapered passage between the seat 5 and the valve 12,-thus allowing a greater quantity of fuel to flow through the holes 8. The motive fluid is thus regulated inexact rela- 'tion to the set'of. the throttle.

The carburetor is provided with a choke throttle 25 which operates in unison with the main throttle 24, being connected therebe removed for clea g P with on the outer side of the body by the coil spring 26 secured between-the arms 27 and 28 on the throttle spindles.

It will be noted that this'choke throttle ed to retain the fuelconta-ined within the' chamber 2 but will allow ready inflow to said chamber through the fuel supply pipe by the suction created by the engine.

Itwill be seen that as the throttle is opened, the needle is moved farther from its seat and the suction within the carbureter chamber draws the fuel through the holes 8 and the fine streams of fuel thus projected are picked up by the current of air flowing through the carburetor.

A suitable plug 31 is arranged in the outer side of the chamber 2 so that the nozzle may and 1t will be seen that with the construction of nozzle'as herein shown, there will be practically no possibility of its becoming clogged in any way.

A carbureter such as described is extremely 4 simple, there are no delicate parts to get out means arranged the air pasage directly engaging the throttle and said valve to slide said valve on said guide in relation to the movement of the throttle.

2. In a carbureter having a fuel nozzle entering the air passage and a throttle, a guide arranged diametrically in the air passage adjacent to and parallel with the axis of the nozzle, a block slidably arranged on said guide, a needle valve adjust-ably arranged in said'block and carried thereby and adapted to control the flow of fuel from said nozzle, and meansarranged within the air pa$age and directly connecting said block with the throttle.

3. In a carburetor having a fuel nozzle entering the air passage and a throttle, a guide arranged diametrically in the air passage adjacent to and parallel with the axis of the nozzle, a block slidably arran d on said guide, a pin extending diametrically across the air passage in rightangular relation to said guide, and a lever member pivoted on said pin and having one end engaging the slidable block and the other end connected .with the throttle.

4. In a carbureter having a fuel nozzle entering the air passage and a throttle, a guide arranged diametrically in the air passage adjacent to and parallel with the axis of the nozzle, a block slidably arranged on said guide and having rack teeth, a valve carried by said block and adapted to control the flow of fuel from the nozzle, a pin exdiametrically across said air passage in right angular relation to said guide, a lever pivoted on said pin having a toothed end engaging the rack teeth of said block anda toothed end engaging the rack teeth of said block and a. toothed quadrant at the opposite end, and a gear quadrant on the throttle medling with the toothed lever.

ROBERT IRWIN HENDER'SON. 

